This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X120-30S, the same code under the new prefix. The ACE replacement is a current-production ISO 21287 compact cylinder in the same bore, stroke and force class, with a matching short body and the same mounting-accessory family, so it fits the same envelope. Confirm mounting-interface dimensions against the ACE datasheet before ordering.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X120-30S is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X120-30S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X120-30S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S
This ACPJ12X120-30S is a double acting, adjustable-stroke compact cylinder in the DIN-standard ACPJ family, now discontinued. Air drives the rod both ways, and the -30 stop screw trims the extend stroke anywhere in a 30 mm window, so the working range is 90-120 mm. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The 120 mm stroke exceeds the 50 mm standard maximum for this bore, so it is a made-to-order build.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim fixtures, sliding doors and pick stations a full-length body cannot reach. Because the -S magnet is fitted on this unit, CMSE or DMSE reed and solid-state switches can be clipped on for end-of-travel sensing. As a working rule, budget about 34 N (roughly 3 kg lifted vertically with a 2:1 margin) of the 0.5 MPa push for real work. For new projects, order the current-production ACEJ12X120, which matches this bore, stroke and force class - just confirm the ISO 21287 mounting dimensions before swapping, since the ACPJ is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X120-30S |
| Bore size | Ø12 mm |
| Stroke | 120 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed bumper (both ends) |
| Max standard stroke | Up to 50 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ12X120-30S (ISO 21287) carries the same bore/stroke/force class; confirm mounting-interface dimensions against the ACE datasheet before installation. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G.
Theoretical Output Force (Ø12mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACPJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -30 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for sensor position sensing (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
Replacement mapping (swap P for E): ACP→ACE, ASP→ASE, ATP→ATE, ACPD→ACED, ACPJ→ACEJ. ACP-family: ACP (double acting), ASP / ATP (single acting push / pull), ACPD (double rod), ACPJ (double rod, adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S Is Used
Semiconductor tray gate
The 90-120 mm adjustable range and 56.5 N push at 0.5 MPa open and close light wafer-tray gates inside cramped machine frames where a full-length body will not fit.
Lab sample presenter
With the fitted -S magnet and CMSE or DMSE switches, the 120 mm stroke indexes sample vials between microscope and analyzer stations at 30-500 mm/s with end-of-travel confirmation.
Electronics fixture ejector
The 42.4 N pull at 0.5 MPa through the M3x0.5 female rod thread lifts small PCBs clear of test nests, and the 30 mm window lets technicians fine-trim the extend stroke on the line.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S with the ACEJ12X120-30S
At 12 mm bore this is the smallest ACPJ size: 56.5 N push at 0.5 MPa suits light clamps, gates and part presenters. Step up to the 16 mm bore for 100.5 N push or the 20 mm bore for 157.1 N at the same pressure if the load grows. Note the stop screw shortens the extend stroke only - it is not a mid-stroke lock, so on air loss the piston still drifts and a separate holding method is needed for suspended loads. FA/FB flange and LB foot mounts plus I/Y rod knuckles bolt to the standard face, and the female M3x0.5 rod thread takes standard tooling. The -S magnet on this model enables CMSE / DMSE switches. For new builds specify the ACEJ12X120 replacement and verify ISO 21287 mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X120-30S
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30S FAQ
At 0.5 MPa the 12 mm bore gives 56.5 N push and 42.4 N pull; at 0.7 MPa it gives 79.2 N push and 59.4 N pull; the theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure, speed 30-500 mm/s, and the -30 stop screw trims the extend stroke by up to 30 mm for a 90-120 mm working range. Plan on about 34 N of the 0.5 MPa push for real work, roughly 3 kg lifted vertically with a 2:1 margin.
An external stop screw shortens the extend stroke on site within the ordered 30 mm window - it cannot lengthen the stroke past the ordered 120 mm. Fixed TPU bumpers at both ends absorb end-of-travel impact, but the stop is a mechanical end stop, not a load-holding brake. The -S magnet fitted on this model accepts CMSE / DMSE reed or solid-state switches for position feedback. This model is discontinued; the current-production drop-in is the ACEJ12X120, so confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X120-30S
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X120-30S replacement — usually within 7-8 hours.